论文部分内容阅读
针对唐口煤矿的地质条件和地表村庄建筑物的现状,依据地表移动变形规律,提出了具体可行的条带开采方案,保证了村庄不搬迁和房屋居住的安全,达到了经济、合理开采的目的。工作面的条带煤柱内布设了钻孔应力传感器、大位移横向变形位移计对条带煤柱进行采前、采中、采后的长时间的应力监测,研究并分析了深部条带煤柱的覆岩应力特征。结果表明,条带煤柱的应力高峰区在距煤壁6～8 m之间,距离煤壁1 m的区域煤柱仍然受到支护系统和煤柱边缘的横向约束作用而处于三向应力状态;距煤壁10 m的煤柱应力始终很小,最大仅为2.5 MPa,说明没有太多的覆岩应力转移到该区域煤柱上。
According to the geological conditions of Tangkou Coal Mine and the current status of surface village buildings, a feasible and feasible strip mining scheme is put forward according to the law of surface movement and deformation, which ensures the safety of the villages and the housing and realizes the economic and reasonable exploitation. . Longitudinal stress monitoring of strip coal pillar during pre-mining, post-mining and post-mining period was laid out in the strip coal pillar of working face, and drilling stress sensor and large displacement transverse deformation displacement meter were set up. Column overburden stress characteristics. The results show that the stress peak area of strip coal pillar is between 6 ~ 8 m away from the coal wall and the coal pillar in the area 1 m away from the coal wall is still restrained by the lateral restraint of the support system and coal pillar edge and in the three-direction stress state The stress of the coal pillar 10 m away from the coal wall is always very small, the maximum is only 2.5 MPa, indicating that there is not much overburden stress transferred to the coal pillar in this area.