工作面回采诱发多断层活化对地表建筑物的影响分析

为了研究工作面回采诱发多断层活化对附近村庄内民房的影响,结合杨河煤矿地质采矿条件及裴沟村的地理位置,通过现场调查民房破坏情况划分了建筑物的采动损坏等级,证明了利用岩层边界角计算由断层活化引起的采动影响范围的不合理性;分析村庄内的地表移动破坏特征确定了断层活化的事实;运用FLAC3D数值模拟揭示了断层活化地表移动变形的特点;综合以上研究,提出了由断层活化造成民房损害的鉴定方法。结果表明:多断层活化具有多米诺骨牌效应,工作面回采产生的破坏,在断层之间依次传递,扩大了开采沉降的范围,增加了受损民房的数目;断层活化的地表倾斜值并非随着远离采空区边界逐渐减小,而是先减小,后增大,造成部分民房破坏加剧;提出以地表移动破坏特征判断断层是否活化、数值模拟确定采动影响范围、民房损害等级划分确定民房受损数目的鉴定方法。

Analysis of the impact of the suffered buildings on the ground due to the mining inducing faulty activation

The paper is to devote itself to an analysis of the impact of the coal mining buildings on the ground for some faulty activation induced by the coal mining based on the geological data and mining conditions of the Yang He coal mine along with the geographical closeness of the neighboring village Pei Gou.For the research purpose,we have first of all investigated the damage degrees suffered by the village buildings and classified the damage levels on the spot,which proves irrational for the mining impact scope due to some mistakenly mining activation with the boundary angle of rock stratum.And,then,we have managed to rectify the above mentioned wrong activities through the analysis of the ground failure features in the aforementioned suffered village.Meanwhile,further investigation and calculation have been done by using a software named FLAG3D finite,which helps to find the internal ground deformation features of the said faults.Based on the above investigation results,we have suggested to adopt a new authenticating method,particularly oriented for the repair of the damaged buildings.The results of our investigation and analysis prove that the said faulty activities may have produced a Domino impact and deliver a destructive force that makes the mining working face displaced and moved away in the faulty points,so as to extend the scope of mining subsidence and increase the damage degrees of the suffered buildings.Far away from the bounder areas of the mined-out area,though the ground tilts extent due to the faulty mining activities fail to get decreased,it proves a little decrease at the beginning and then tends to increase again,thus leading to more serious damages to some buildings.Thus,the new authenticating testing method of the damaged buildings has been brought about,which is made of three components—judging whether the faults are activated or not by analyzing the ground movement deformation failure features,ascertaining the mining influence scope through the numerical simulation software FLAC3D and identifying the damage level of the suffered buildings.