榆神府矿区覆岩协调沉降开采技术

Overlying strata's harmonious settlement mining technology in Yu-shen-fu mining area

为研究协调沉降开采中覆盖层的运动破坏规律和导水裂隙发展规律,确定榆神府覆岩协调沉降开采参数,采用相似材料模拟实验研究和煤柱稳定性理论进行分析.模拟实验表明,在覆岩协调沉降开采中,充填煤柱的逐渐失稳使采空区上覆岩层产生协调沉降运动,上覆岩土层进入裂隙带或弯曲下沉带,阻止了导水裂隙带的发展,保护了隔水层的稳定.理论分析表明,所确定的充填煤柱能够适时失稳,支撑煤柱能够保持永久稳定,到达了覆岩破坏协调沉降目的.现场开采实践证明开采参数确定合理.

To study the harmonious of sedimentation layer mining failure law and law of water flowing fracture development, and determine the Yu-shen-fu mining overburden harmonious settlement parameters, this paper used the similar material simulation experiment and the stability of coal pillar theoretic analysis. Similar material experiment shows that, in the process of harmonious settlement mining, filling coal pillars gradually instability makes the overlying strata above gob have a harmonious settlement, so the soil overburden enters into the fractured zone or bending zone, which stops the development of water flowing fractured zone, and protects the stability of aquifuge. The theoretical analysis shows that the coal pillar, filling the timely instability, supporting coal pillars can maintain a permanent stability, and reached the overburden failure to coordinate settlement. The actual mining practice proved that the mining parameters are reasonably determined.