煤矸石山在自然状态下长时间堆积势必存在失稳隐患，对其周围的居住区及生态环境构成威胁。因此，对煤矸石山的稳定性分析研究显得十分必要。论文以古书院煤矿矸石山治理为工程背景，采用理论分析、数值模拟及现场实测相结合方法开展煤矸石山稳定性分析，并在此基础上展开治理措施探索。研究取得的结论有以下几点：

（1）通过对煤矸石山的失稳模式研究，得到煤矸石山的失稳主要表现为内部滑动、沿接触面滑动和软弱基底破坏引起滑塌三种模式；分析得到影响煤矸石山稳定性的因素主要包含矸石山散体物理力学性质、堆体结构、降雨入渗及堆积方式等四个方面，其中矸石散体物理力学性质是影响矸石山稳定性的最主要因素之一。

（2）通过现场试验及相关力学试验，得到煤矸石山物理力学参数，为理论公式及数值模拟求解稳定性系数提供依据。基于极限分析上限法理论和不平衡推力原理，引入强度折减法理论，对边坡滑移体的运动力学特性和受力状态进行了研究，推导得出煤矸石山稳定性系数计算公式，并且建立了古书院矿矸石山边坡稳定性评判标准。结合古书院矸石山工程特点和试验参数，求解得到相应的矸石山稳定性系数。

（3）采用FLAC数值模拟方法对矸石山稳定特性进行了分析，并结合理论求解得到的稳定性系数，对古书院矿煤矸石山的稳定性进行了评价。稳定性评价结果表明，矸石山多个区域属于欠稳定状态，需要进行加固处理，为矸石山治理提供理论依据。

（4）提出古书院煤矸石山治理方案：在斜坡坡顶平台位置施工钻孔和注浆加固治理，并进行了治理方案设计。旨在通过对边坡松散煤矸石堆积区域进行加固，形成似重力式挡墙结构，并在加固后对治理区域边坡进行坡表绿化。

The coal gangue dump is bound to be unstable when it is piled up for a long time under the natural state, which poses a threat to the surrounding residential areas and ecological environment. Therefore, it is necessary to analyze the stability of coal gangue dump. Based on the engineering background of the treatment of the coal gangue dump in Gushuyuan Coal Mine, the stability analysis and treatment measures of the coal gangue dump are analyzed by combining theoretical analysis, numerical simulation and field measurement. The main conclusions of the study are as follows:

(1) Through the study on the instability mode of coal gangue dump, it is concluded that the instability of coal gangue dump mainly includes three modes: internal sliding, sliding along the contact surface and collapse caused by the failure of soft foundation; the factors influencing the stability of coal gangue dump mainly include the physical and mechanical properties of gangue dump, pile structure, rainfall infiltration and accumulation mode. Among them, the physical and mechanical properties of gangue bulk is one of the most important factors affecting the stability of gangue dump.

(2) The physical and mechanical parameters of coal gangue dump are obtained through field test and relevant mechanical test, which provides basis for theoretical formula and numerical simulation to solve stability coefficient. Based on the theory of upper bound method of limit analysis and unbalanced thrust principle, we add strength reduction method theory to study the dynamic mechanical characteristics and stress state of slope sliding body, derive the calculation formula of coal gangue dump stability coefficient, and establish the evaluation standard of slope stability of gangue dump in Gushuyuan Coal Mine. According to the engineering characteristics and test parameters of gangue dump, we get the corresponding stability coefficient.

(3) The stability coefficient obtained by FLAC numerical simulation and theoretical solution is used to evaluate the stability of the coal gangue dump in Gushuyuan Coal Mine. The results of stability evaluation show that many areas of the gangue dump are under stable state and need to be reinforced, which provides a theoretical basis for the treatment of gangue dump.

(4) The paper puts forward the treatment scheme of the coal gangue dump in the ancient academy: drilling and grouting reinforcement at the top platform of the slope. The purpose of the treatment scheme is to reinforce the loose coal gangue accumulation area of the slope to form a gravity-like retaining wall structure, and greening the slope surface of the treatment area after reinforcement.