Detail of GB/T 50511-2022

Introduction of GB/T 50511-2022

1 General Provisions 1.0.1 To unify the technical requirements for the construction of coal mine shaft engineering, to ensure construction safety and quality, and promote the development of coal mine shaft construction, the development of this standard. 1.0.2 This standard applies to the construction of coal mine shaft engineering. 1.0.3 coal mine shaft engineering contract and engineering technology documents on the construction quality requirements shall comply with the provisions of this standard. 1.0.4 The construction of coal mine shaft engineering should implement modern scientific management, the implementation of green construction Work, and constantly improve the management level. 1.0.5 The construction of coal mine shaft engineering should actively promote the application of mature new technologies, new techniques, new equipment and new materials. 1.0.6 Materials, equipment and components used in construction shall conform to the design and product quality standards, and shall have a certificate of conformity. 1.0.7 Technical files should be established in the construction of the project, and should do a good job of various test records, concealed works records, quality inspection records and completion of the project drawings and other documents and information collection, collation. Construction summary should be done when the project is completed, the completion data should be true, complete and complete. 1.0.8 The construction of coal mine shaft project shall comply with the standard, in addition to the provisions of the relevant national standards. 2 Terminology 2.0.1 construction organization designconstruction organization design guide the construction of coal mine shaft engineering systemic technical documents. 2.0.2 constructionaloperating rules According to the construction organization design, combined with the specific engineering geology and hydrogeology conditions and other technical documents for guiding the construction of the project. 2.0.3 technicalmeasures of construction Used to assist the production system of sporadic engineering construction or in construction conditions change when the construction operating procedures to supplement the technical documents prepared. 2.0.4 Single operationsingle operation is a way of operation in which the two major processes of excavation and permanent support in shaft engineering are constructed in sequence respectively. 2.0.5 Parallel operation Parallel operation in which two processes of excavation and permanent support are carried out simultaneously in different spaces. 2.0.6 operation by short section excavationand lining Shaft construction in the same excavation and lining cycle, short section excavation and permanent support of the two processes alternately for construction, can be without temporary support operations. 2.0.7 Alluvium alluvium Loose strata overlying stable bedrock 2.0.8 base groove In the safety structure and other special engineering parts of the surrounding rock in the trench cut perpendicular to the axis of the roadway. 3 Construction preparation 3.1.1 The following preparations should be made before the start of the shaft project. 3.1 General provisions 1 The construction unit organizes the review of mine geological data and inspection hole data, and draws the predicted map of shaft engineering geological plan and profile. 2 construction unit organization to complete the design delivery, and drawings will be reviewed 3 Prepare construction organization design, construction operation procedures, construction technical measures. 4 complete the installation of construction facilities and equipment. Vertical wells, inclined shafts and flat Dong before the start of work, should also complete the following work. 1) measurement base point transfer, project orientation, site measurement, pile laying, site leveling and obstacle removal. In the construction of multiple units, should be unified coordination, verification of measurement Measurement results 2) Transportation, water supply and drainage, power transmission, communication, lightning protection, fire prevention, flood prevention and other necessary production, living and auxiliary facilities during construction. 3) vertical shaft locking, inclined shaft and flat open groove and wellhead excavation Reasonable allocation of resources to ensure continuous construction Handle the start-up procedures 4 Vertical shaft shaft ordinary method construction 4.1 General regulations 4.1.1 Wellbore construction operation shall comply with the following provisions? 1 Wellbore construction operations should be based on the diameter of the wellbore, depth, geological and hydrological conditions and other factors, after a comparison of technical and economic programs to determine. 2 shaft construction is appropriate to use a short section of digging mixed mode of operation, can also use a single line or parallel mode of operation. 3 vertical shaft to flat road construction before the temporary rewinding of the shaft, transport level below the well nest should be reserved to meet the requirements of the over-release distance, over-release distance requirements should be in line with the relevant provisions of the current national "Coal Mine Safety Regulations". 4.1.2 Well Jane digging pointing method should comply with the following provisions: 1 When the well Jane digging depth is not greater than 300m, laser pointing can be used. When the borehole digging depth is greater than 300m, shaking into the laser pointing, masonry well wall should be used in the vertical line pointing. 3 special accuracy requirements of the shaft, digging and masonry should be used in the plumb line pointing; 4 when using laser pointing, laser pointing instrument should be regularly calibrated, digging allowable deviation value of ten 15mm, masonry police allowable deviation value of ten 5mm. 4.1.3 The construction arrangement of the room connected with the shaft shall conform to the following regulations. 1 should be well connected with the wellbore bunker room measurement positioning orientation work. 2 with the shaft connected to the ketone room or tunnel, in the construction of the shaft, it is appropriate to dig out at the same time 3m ~ 5m, and should be masonry with the shaft. 5 Special method of vertical shaft construction 5.1 General Provisions When the vertical well shaft passes through the unstable alluvial layer and water-bearing rock layer, the special method 5.1.1 shall be used for construction. 5.1.2 The selection of special construction methods shall be based on geology, hydrogeology, wellbore characteristics, construction technology and equipment and other comprehensive factors, determined by technical and economic analysis and comparison. 5.1.3 Wellbore sections constructed by special methods shall conform to the following provisions. 1 freezing method of construction of the wellbore section, freezing section is not greater than 400m, the water volume should not be greater than 0.5m / h, freezing section is greater than 400m, the increase in water leakage per 100 meters should not be greater than 0.5m * / h. 2 borehole section constructed by drilling method, the water leakage should not be greater than 0.5m/h. 3 After ground pre-grouting, the water leakage should not be greater than 6.0m/h when the grouting section of the wellbore is less than 600m; when the grouting section is greater than 600m, the increase in water leakage should not be greater than 1.0m'/h per 100m; 4 The well wall should not have concentrated water leakage holes and water holes containing sand. The special method of construction of the shaft, in the alluvial layer shall not be reserved or after cutting beam 5.1.4 nest. Installation of well beams should be anchored by anchor rods or other methods that do not damage the well wall. The depth of anchor rods in single-layer well walls should not exceed 3/5 of the well wall thickness, and the depth of wrong rods in double-layer wells should not exceed 4/5 of the inner well wall thickness. 5.2 Freezing method construction 5.2.1 The freezing method can be used in complex formations such as unstable alluvium, loose rock formations, and bedrock aquifers. 6 Extension and recovery of vertical wellbore 6.1 General Provisions 6.1.1 Before extending the depth of the wellbore, the following information shall be obtained. 1 original longitudinal and cross-sectional diagrams, wall structure diagrams, well equipment diagrams, well diagrams and the connection of the bottom of the well yard, and the bottom of the yard plan, section and slope diagrams. 2 mine hoisting and transportation, power supply, drainage, air pressure, ventilation and other equipment capacity and systems 3 need to extend the depth of the shaft related geological, hydrological information and related design documents 6.1.2 The top-down construction method can be used to extend the depth of the wellbore. When conditions allow, it is appropriate to use the bottom-up construction method, and it is appropriate to use the reverse well drilling rig construction. When brushing and expanding support from top to bottom, measures should be taken to prevent blockage of guide holes. 6.1.3 It is appropriate to use the existing facilities of the mine for the shaft extension project, and the facilities used shall meet the requirements of operational safety. 6.14 extension of the center of the shaft Jane and cross-line calibration should comply with the following provisions: when using the protection of rock column protection, to the rock column below the center of the shaft and cross-line transfer process, two wire measurements of the center of the shaft Jane allowed mutual difference should be 20, the calibration value should be taken as its average; two measurements of the cross-line orientation allowed mutual difference should be 2, and the allowable deviation of the design orientation should be Shi 1', the calibration value should be taken as its average. 2 when using artificial protection plate protection, before the construction of the protection plate should be transferred to the center of the shaft and crosshairs below the protection plate, and the allowable deviation of the center of Jane should be 10mm, and the allowable deviation of the crosshair orientation should be 1'. 6.1.5 When the extension project is completed, the abandoned temporary roadway, room should be closed or filled with plugging 7 Inclined shaft and flat towers construction 7.1 General provisions 7.1.1 inclined shaft, flat towers construction program should be selected in accordance with the following provisions: should be a reasonable choice of rock drilling, drainage, lifting, transportation, support and other equipment supporting the way. 2 construction program should be based on the project section, length, slope, support form, geological and hydrological conditions, construction schedule and other factors, through a comprehensive technical and economic program to determine after comparison. 7.1.2 The row research and transportation of the slope pindone shall conform to the following regulations. 1 slope less than 8 ° inclined shaft and flat transport should use trackless rubber wheel transport equipment Equipment, flat ketone can also be used motor car traction mine car or shuttle transport; 2 slope greater than or equal to 8 slope shafts should be used for rail transport, should be arranged skip and mine car two sets of lifting system, and two sets of lifting system should have independent signal device. 3 inclined shaft, flat ketone construction of rock loading equipment can be used to put the bucket rock loader, can also be used to digging bucket slag loader, shovel loader, side discharge rock loader, the choice of rock loading equipment should meet the requirements of the operating environment and supporting transport conditions. 4 from the working face or transfer station to the ground using the tracked way to row research, it is appropriate to set up a floor-type research stone bin or directly into the row research car at an appropriate location near the wellhead, using the trackless way can be transported directly to the designated place row research. 7.1.3 inclined shafts and ketones should be used in parallel operation construction, and should develop safety technical measures. 8 Roadway construction 8.1 General provisions 8.1.1 The mechanized operation line of flat roadway shall conform to the following provisions. 1 should be based on the nature of the roadway surrounding rock, length, section, construction plans and other program supporting the demonstration, rock drilling, rock loading, shunting, transportation, support and other major processes should be mechanized operations. 2 should obtain reasonable technical and economic indicators. 3 mechanical capacity and performance of each process should be coordinated with each other. 4 supporting equipment selection should be compatible with the mine transportation system, power supply, pressure, air supply and other auxiliary systems, equipment configuration capacity should be sufficient. 8.1.2 The construction of flat road shall conform to the following regulations. 1 The distance between permanent support and digging working face, when using wrong spray for permanent support, should follow the digging working face, the distance between permanent support and digging working face should not be more than 50m for artillery digging, and not more than 100m for machine digging, when using masonry support, should have temporary support, and temporary support should follow the working face. 2 Permanent ditch should not be more than 100m from the digging working face. 9 Concealed shaft and ketone chamber construction 10 Auxiliary work 11 Green construction Appendix A Classification of Hydrogeological Conditions of Mine Shafts Rock Stability Classification Appendix B Classification of rock formation stability Explanation of terms used in this standard List of referenced standards

Contents of GB/T 50511-2022

1 General Provisions 2 Terminology 3 Construction preparation 4 Vertical shaft shaft ordinary method construction 5 Special method of vertical shaft construction 6 Extension and recovery of vertical wellbore 7 Inclined shaft and flat towers construction 8 Roadway construction 9 Concealed shaft and ketone chamber construction 10 Auxiliary work 11 Green construction Appendix A Classification of Hydrogeological Conditions of Mine Shafts Rock Stability Classification Appendix B Classification of rock formation stability Explanation of terms used in this standard List of referenced standards