基于措施井底抽巷的煤巷掘进优化技术
Optimal Technology for Coal Roadway Tunneling Based on Bed Plate Tunnel in Measure Well
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摘要: 米箩煤矿属于典型的贵州山区突出煤矿，煤层赋存条件比较复杂。根据煤矿地质勘测资料进行了措施井的优化布置分析；3#煤层作为上煤组其他煤层的保护层，该煤层首采工作面110302是综采工作面；利用措施井开拓超前于首采面运输顺槽和回风顺槽的1102底抽巷，运用理论分析和数值模拟结果对1102底抽巷布置层位进行了可行性分析；利用1102底抽巷向穿层钻孔对顺槽掘进条带区域进行瓦斯预抽，并由主井和措施井向110302工作面中部相向掘进顺槽。经过实际工程验证后得出1102底抽巷围岩稳定，变形较小，110302工作面顺槽掘进条带区域经过消突后，采用相向掘进的方法有效地促成了首采工作面的提前投产。Abstract: Miluo Coal Mine with comparatively complex coal seam occurrence conditions is the typical outburst coal mine in Guizhou mountain area. According to geological reconnaissance, optimal arrangement is analyzed for measure well. 3# coal seam is the protective layer of other coal seams of upper coal group, the 110302 first mining face is fully mechanized mining face. The 1102 bed plate tunnel is excavated in ahead of haulage gate and return air gate of the first mining face with measure well. Feasibility analysis on layout layer is made for 1102 bed plate tunnel by theoretical analysis and numerical simulation. Gas, in belt-shaped region where crossheading is excavated, is pre-drained by bores through coal and rock seam of 1102 bed plate tunnel. Then, crossheading excavated oppositely in the middle of 110302 working face from main well and measure well. After practical engineering verification, it is concluded that 1102 bed plate tunnel has stable surrounding rock with less deformation, outburst danger is eliminated in belt-shaped region, opposite excavation effectively facilitates the first mining face to put into production in advance.
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