晋城矿区9号煤沿空留巷试验研究

结合具体条件进行了巷旁充填支护参数设计 ,在矿压观测基础上,分析了留巷围岩变形及充填体载荷特征,把高水速凝充填材料沿空留巷与炮掘及综掘成巷方法进行经济对比,结果表明,该留巷方法有明显技术和经济优势, 在晋城矿区9号煤中有很好推广应用价值.     

综放巷内充填沿空留巷工业试验

针对常村煤矿S2-6综放工作面采用传统技术沿空留巷的难点，进行了巷内充填沿空留巷工业试验．试验分三步进行：第一步，对原巷采用锚梁网索联合支护实施加固，撤掉梯形架棚；第二步，在已加固巷道下一工作面侧煤壁，实施扩帮锚网支护；第三步，在原巷位置实施巷内充填，并加固充填体．结合高水速凝充填材料的性能，通过建立合理的综放沿空留巷的围岩结构力学模型和充填工艺设计，井下工业试验达到了预期效果，留巷断面稳定后超过10m^2．证明了在巷内基本支护为梯形金属支架的巷道中进行综放沿空留巷的可行性，并作了经济效益评价．在此基础上提出了综放巷内充填沿空留巷新技术．     

沿空留巷巷旁充填体主要参数研究

在现场实践的基础上,本文对高水灰渣巷旁充填体的作用机理进行研究,由此得到求解巷旁充填体力学参数的力学模型和计算公式,计算所得结果与现场实测所得结果基本一致,为沿空留巷巷旁支护设计提供了依据。     

朱庄煤矿坚硬特厚顶板沿空留巷技术应用

针对保留煤柱护巷中存在采出率低、巷道维护困难等问题,在坚硬特厚顶板条件下沿空留巷围岩移动规律分析的基础上,提出了针对性的沿空留巷控制技术与手段,形成了配套的墙体充填材料、工艺系统与组织形式,优化了留巷后期巷道及墙体支护参数,提高资源回收率,实现相邻区段连续开采.以朱庄煤矿坚硬特厚直覆顶板综采工作面为研究对象,分析模板支架充填沿空留巷技术和取得的效果.     

用小煤柱沿空留设材料巷的研究

目前煤矿采用的沿空留巷采煤法多是留设运输平巷,由于该巷机电设备多、人员多又无轨道,给运送巷旁支护材料带来诸多不便,造成巷旁不能及时支护,留巷变形量大影响生产．为改变这种状况,提出了用小煤柱留设材料巷来解决以上问题,并对小煤柱护巷的可行性、护巷原理及有关参数进行了分析研究,它的推广使用对进一步扩大无煤柱开采的应用范围起到积极的作用．     

沿空留巷巷旁支护技术的发展

在综述巷旁支护技术发展历程的基础上，提出膏体材料巷旁充填沿空留巷新技术；分析沿空留巷顶板破断垮落特征，建立了膏体材料巷旁充填沿空留巷的力学模型，提出了膏体材料巷旁支护体主要参数的确定方法，并将研究结果应用于工程实践。     

沿空留巷整体浇注护巷带主要参数及其适应性

通过现场实测和理论分析,对不同围岩条件下老顶断裂引起的整体浇注护巷带的支护强度和变形能力进行了深入研究,提出了使沿空留巷巷道保持稳定的整体浇注护巷带支护强度与变形的理论计算方法,进而对沿空留巷整体浇注护巷带的适应性进行了研究．     

综放沿空留巷顶板活动规律的模拟分析

采用相似材料模拟和计算机数值模拟,对沿空留巷老顶破断位置与形状、不同支护方式对顶板活动的影响以及相关的巷旁上技术和进行了初步分析。模拟结果表明,采用锚杆（索）网联合支护和人工筑构较充强度的巷旁充填体,有利于综合机构放顶煤开采沿空留巷顶板的稳定,并给对充填带宽度和充填材料抗压强度的最低要求。     

巷旁充填体可缩性对沿空留巷顶板运动的适应性分析

分析了沿空留巷巷道顶板岩层运动的过程及岩块之间的几何关系 ,得到了高水速凝充填体所需变形量的计算模型 .理论及现场实测结果都表明 ,目前所用高水速凝材料的可缩性不能很好地适应巷道顶板运动特性 ,必须加以改进     

深井综放沿空掘巷合理支护形式研究

为了给深井综放沿空掘巷的支护选型和参数设计提供指导与依据,首先从结构力学的角度对目前综放沿空掘巷常用的工字钢棚和锚网梁(索)2种支护形式的作用机理进行了分析,然后通过实验室物理模拟试验研究了上述2种支护形式的作用效果,并且从关键承载层与次生承载层的相互关系分析了锚索的支护作用.结果显示,锚网梁(索)支护能很好地适应深井综放沿空掘巷的变形特点与维护要求,是理想的支护形式;顶板锚索的作用主要是将锚杆锚固形成的次生承载层与深部关键承载层连接起来,大大增强围岩稳定性.     

晋城矿区东部9号煤层及其顶底板岩性的研究

通过对 9号煤层及其顶底板岩性的研究 ,得出如下结论 :9号煤层煤层厚度变化很大 ,但层位稳定 ,在现代开采技术条件下应属大部可采煤层 ;9号煤层顶板K4灰岩厚度不稳定、相变大 ,须注意小于 0 .5m厚度顶板范围及相变部位的顶板管理 ;9号煤层底板为高岭石粘土岩 ,遇水易膨胀底鼓 ,对综采机械化生产可造成影响     

晋城矿区东部9号煤层及其顶底板岩性的研究

通过对9号煤层及其顶底板岩性的研究,得出如下结论9号煤层煤层厚度变化很大,但层位稳定,在现代开采技术条件下应属大部可采煤层;9号煤层顶板K4灰岩厚度不稳定、相变大,须注意小于0.5 m厚度顶板范围及相变部位的顶板管理;9号煤层底板为高岭石粘土岩,遇水易膨胀底鼓,对综采机械化生产可造成影响.     

Surrounding rock control of gob-side entry driving with narrow coal pillar and roadway side sealing technology in Yangliu Coal Mine

Gob-side entry driving can increase coal recovery ratio, and it is implied in many coal mines. Based on geological condition of 10416 working face tailentry in Yangliu Coal Mine, the surrounding rock deformation characteristics of gob-side entry driving with narrow coal pillar is analysed, reasonable size of coal pillar and reasonable roadway excavation time after mining are achieved. Surrounding rock control technology and effective roadway side sealing technology are proposed and are taken into field practice. The results showed that a safer and more efficient mining of working face can be achieved. In addition, results of this paper also have important theoretical significance and valuable reference for surrounding rock control technology of gob-side entry driving with narrow coal pillar under special geological condition.     

Stability of coal pillar in gob-side entry driving under unstable overlying strata and its coupling support control technique

Considering the situation that it is difficult to control the stability of narrow coal pillar in gob-side entry driving under unstable overlying strata, the finite difference numerical simulation method was adopted to analyze the inner stress distribution and its evolution regularity, as well as the deformation characteristics of narrow coal pillar in gob-side entry driving, in the whole process from entry driving of last working face to the present working face mining. A new method of narrow coal pillar control based on the triune coupling support technique (TCST), which includes that high-strength prestressed thread steel bolt is used to strain the coal on the goaf side, and that short bolt to control the integrity of global displacement zone in coal pillar on the entry side, and that long grouting cable to fix anchor point to constrain the bed separation between global displacement zone and fixed zone, is thereby generated and applied to the field production. The result indicates that after entry excavating along the gob under unstable overlying strata, the supporting structure left on the gob side of narrow coal pillar is basically invalid to maintain the coal-pillar stability, and the large deformation of the pillar on the gob side is evident. Except for the significant dynamic pressure appearing in the coal mining of last working face and overlying strata stabilizing process, the stress variation inside the coal pillar in other stages are rather steady, however, the stress expansion is obvious and the coal pillar continues to deform. Once the gob-side entry driving is completed, a global displacement zone on the entry side appears in the shallow part of the pillar, whereas, a relatively steady fixed zone staying almost still in gob-side entry driving and present working face mining is found in the deep part of the pillar. The application of TCST can not only avoid the failure of pillar supporting structure, but exert the supporting capacity of the bolting structure left in the pillar of last sublevel entry, thus to jointly maintain the stability of coal pillar.     

Soft-strong supporting mechanism of gob-side entry retaining in deep coal seams threatened by rockburst

When gob-side entry retaining is implemented in deep coal seams threatened by rockburst, the cement-based supporting body beside roadway will bear greater roof pressure and strong impact load. Then the...     

高瓦斯矿井一次采全高综采工作面瓦斯治理

介绍了晋城矿区寺河矿高瓦斯矿井一次采全高工作面瓦斯治理方法和瓦斯利用情况,提出了高瓦斯矿井一次采全高工作面瓦斯治理途径和技术,指出高瓦斯矿井高产高效、安全生产的根本出路在于提高瓦斯抽放率,加强瓦斯利用,进而提高矿井的综合效益.     

覆岩分次垮落时留巷顶板离层形成机制

从采场侧向覆岩活动的阶段特征入手,结合数值模拟分析了顶板离层的形成过程,建立了顶板岩梁受力模型,推导得出了顶板下沉与离层数值的影响因素和算式.在采动期间,巷道顶板同期破断的岩层组间不会发生离层,分次垮落岩层组间的离层值取决于各岩层组力学性质与层厚的差异,并受顶板岩梁旋转基点深度和采空区侧向悬臂长度的影响.提供合理的顶板支护阻力可以约束锚固区内的离层,以高初撑力锚杆索和单体支柱为基础的刚性主动支护,能够扩散和均化支护应力,满足控顶载荷需求并有效控制离层.