煤炭开采对侯西铁路影响分析及保护煤柱设计

Influence Analysis of Coal Mining to Houxi Railway and Design of Protective Coal Pillar

王村煤矿按设计的侯西铁路保护煤柱开采后地表出现了大量裂缝,导致侯西铁路局部路段的路基产生下沉开裂,影响了路基的稳定及列车的安全运行。为确保王村井田内侯西铁路保护煤柱设计的科学、合理,对地表产生裂缝的原因进行了分析,主要由于该区域采深小、基岩薄、第四系黄土层塑性小等特殊地质条件,以及13506工作面开采后区段煤柱垮落,达到充分采动,从而导致地表移动变形加剧,地表裂缝比较发育。并根据分析结果对铁路保护煤柱进行了重新划定。

A large number of cracks appear after the coal resources are mined out according to the design of protective coal pillar under Houxi railway in Wangcun coal mine,leading to subsidence and crack in local sections of Houxi railway roadbed. This affects the stability of roadbed and the stable operation of the train. In order to make sure the design of protective coal pillar under railway more scientific and reasonable,the reasons for cracks are analyzed. Due to the special geological conditions,including the small depth,thin bedrock,less plastic of Quaternary loess layer,and the failure of coal pillars resulted from the mining of 13506 working face to reach full-scale mining,the surface movement and deformation increased,and surface cracks are well developed. According to the analysis,the proactive coal pillar will be re-planned.