古汉山煤矿软岩巷道底臌原因分析及防治措施

通过对处于软弱破碎带及构造应力集中区之中的古汉山煤矿井底车场巷道的长期观测研究 ,提出了软岩巷道底臌的形式 ,并结合该矿实际情况 ,分析了底臌形成的原因 ,提出了防治底臌的措施 ,有效地解决了巷道中底臌事故 .     

矿井深部软岩巷道底臌机理及其防治措施研究

现场实测分析研究表明,底臌是矿井深部巷道变形破坏的主要因素,在对巷道底臌机理进行分析的基础上,提出了防治底臌的综合技术措施,取得了较好的效果。     

软岩巷道底鼓的防治措施

论述了巷道底鼓的综合防治措施：新奥法施工；选择合理断面；提高围岩强度、改善围岩力学性能；利用支护等。     

深埋巷道底臌及防治的蠕变模拟试验和数值分析

通过蠕变模拟试验和数值方法的对比分析有现代化研究了巷道底臌机理以及采取底板加固和底析切缝防治方法后，巷道围岩变形、破坏等随时间的变化，并探讨了防治参数对底臌的影响。     

长壁工作面沿空巷道底臌机理与防治

本文分析了长壁工作面沿空巷道底臌的主要原因，从刚塑性滑移场理论出发，提出用巷道角锚杆防治沿空巷道底臌的方法。并提出了密度计算公式和锚杆长度的确定原则，在实际应用中取得了良好的效果，在锚杆支护理论方面和现场生产应用方面均有实际意义。     

软岩特性及软岩巷道底鼓机理

论述软岩的特性和巷道底鼓的机理.对支护和开采类似软岩,取超常规对应措施提供了理论依据.     

软岩巷道围岩变形形态与适时支护

应用特征值法分析了围岩变形形态与支护之间的关系，介绍了确定最优支护时间的原理和方法，并用实例证明了该方法的可靠性和简单易行的的特点。     

Failure mechanism of Mesozoic soft rock roadway in Shajihai coal mine and its surrounding rock control

In view of the buckling failure caused by large deformation of Mesozoic soft rock roadway in Shajihai mining area, such as serious roof fall, rib spalling, floor heave, etc., based on the detail site i...     

古汉山煤矿副井马头门破坏原因及修复对策

通过对古汉山煤矿副井马头门施工 1 0d左右就开始出现破坏的原因分析 ,对马头门平顶段、斜顶段以及与其毗邻的管子道上平台、副井马头门以上至管子道上平台之间的井筒 ,分别采取工字钢棚浇注混凝土、工字钢棚喷射混凝土、树脂锚杆、槽钢骨架喷射混凝土等不同的加固措施进行综合加固 ,取得了一定的效果 .     

古汉山煤矿副井马头门破坏原因及修复对策

通过对古汉山煤矿副井马头门施工10d左右就开始出现破坏的原因分析,对马头门平顶段、斜顶段以及与其毗邻的管子道上平台、副井马头门以上至管子道上平台之间的井筒,分别采取工字钢棚浇注混凝土、工字钢棚喷射混凝土、树脂锚杆、槽钢骨架喷射混凝土等不同的加固措施进行综合加固,取得了一定的效果.     

Numerical simulation of grooving method for floor heave control in soft rock roadway

Grooving method can restrain the deformation and destruction of surrounding rock by transferring the maximum stress to deep rock, bringing about the effective control for floor heave in soft rock roadway.Based on this important effect, and to discuss the relationship between cutting parameters and pressurerelief effect, this paper carried out a numerical simulation of grooving along bottom slab and two sides of gateway with finite difference software FLAC2D. The results show that the control effect on floor heave in soft rock tunnel can be improved by selecting appropriate cutting parameters. Appropriately increasing the crevice depth in the middle of the floor can improve the stress state of bottom slab by stress transfer.So the floor heave can be more effectively controlled. To lengthen the crevice in the comers of roadway can simultaneously transfer the maximum stresses of bottom slab and two sides to deep rock, And promote the pressure-relief effect. Extending the crevice length and crevice width on both sides within a certain range can decrease the stress concentration in the corners of roadway, and reduce the deformation of two sides. The cutting position beneficial to restrain the floor heave is close to the bottom slab.     

深部煤层大巷围岩破坏特征及强力锚固控制技术

河南焦煤能源有限公司赵固一矿北翼深部煤层回风大巷围岩节理化严重,在采掘支承压力作用下,矿压显现强烈,表现为两帮收缩、底鼓严重,巷道支护系统失效.针对此问题,采用数值模拟方法研究原岩应力场、采动应力场和支护应力场的"三场"应力分布特征,为巷道高强支护提供理论依据,同时应用再造承载层巷道围岩控制原理,提出北翼深部煤层回风大巷采用"锚网索+喷浆+注浆+底板鸟笼锚索+补强锚索"围岩控制方案,并用数值模拟方法对不同支承压力作用下的巷道围岩变形、塑性区演化、支护受力和主应力差等进行研究,结果表明:随着支承压力集中系数增大,巷道断面收缩率逐渐增加,围岩塑性区由拱形演变为蝶形、蟹形和龟形;锚索在高支承压力作用下将逐步失效,主应力差呈现多峰值现象.工程实践表明,提出的强力锚固支护技术能有效控制围岩的变形破坏,具有较好的技术性和经济合理性.     

耿村煤矿煤厚变化及其成因分析

由趋势面分析证明:在含煤地层形成时期,井田中部存在一条横贯东西的隆起带和一条近南北向的坳陷带横跨复合,这一格局控制了煤层厚度变化的总趋势.随着中部隆起带逐渐南移,南北向坳陷向东部扩大,构建了不同煤层形成时期的复杂图像.     

耿村煤矿煤厚变化及其成因分析

由趋势面分析证明 :在含煤地层形成时期 ,井田中部存在一条横贯东西的隆起带和一条近南北向的坳陷带横跨复合 ,这一格局控制了煤层厚度变化的总趋势 .随着中部隆起带逐渐南移 ,南北向坳陷向东部扩大 ,构建了不同煤层形成时期的复杂图像 .     

Failure mechanism and control technology of water-immersed roadway in high-stress and soft rock in a deep mine

Aiming at soft rock ground support issues under conditions of high stress and long-term water immersion, the ground failure mechanism is revealed by taking the deep-water sumps of Jiulong Mine as the engineering background and employing field investigation, tests of rock structure, mechanical properties and mineral composition. The main factors leading to the surrounding rock failure include the high and complex stress state of the water sumps, high-clay content and water-weakened rock, and the unreasonable support design. In this paper, the broken and fractured rock mass near roadway opening is considered as ground small-structure, and deep stable rock mass as ground large-structure. A support technology focusing on cutting off the water, strengthening the small structure of the rock and transferring the large structure of the rock is proposed. The proposed support technology of interconnecting the large and small structures, based on high-strength bolts, high-stiffness shotcrete layer plugging water,strengthening the small structure with deep-hole grouting and shallow-hole grouting, highpretensioned cables tensioned twice to make the large and small structures bearing the pressure evenly,channel-steel and high-pretensioned cables are used to control floor heave. The numerical simulation and field test show that this support system can control the rock deformation of the water sumps and provide technical support to similar roadway support designs.