三软煤层老空区煤柱开采巷道支护技术试验研究

新庄煤矿3304工作面为煤软、顶板和底板岩层都软的三软煤层老空区煤柱开采,顺槽巷道沿空掘进,底鼓强烈,严重影响正常生产.为确定合理的支护形式,控制底鼓的产生,现场测定了支架的受力及项、底板移动变形,分析了影响巷道底鼓的因素,通过井下底板锚网支护试验,提出该开采条件下的巷道支护形式,现场应用效果较好.

Research on Roadway Support Technique for Coal Pillar Mining in the Old Mining Area Known for Weak Seams

Mining of No. 3304 coal face of Xinzhuang Colliery belongs to the situation of coal pillar mining of the old mining area known for weak coal seams in 3 aspects (3-seft seam). When driving along next goat', the case of the floor heave emerge almost instandy, which severely affects normal production. In this research, on-the-spot Measuring of the supporting force, the movement and deformation of the floor are conducted, then the models and influencing factors of the floor heave are analyzed and determined. A new roadway supporting method is put forward after an anchor net supporting experiment has been conducted.