The horizontal section top coal caving in steep seam is different from the gently inclined seam.
急斜煤层水平分段放顶煤开采与缓斜煤层不同，工作面沿煤层厚度的水平线布置，长度短。
The research results showed that an arch structure would be formed in the top coal above the supports.
研究表明，支架上方顶煤体中能够形成“拱”结构，该结构的存在将对工作面矿山压力显现产生显著影响。
The rational selection of the technique parameters played an important role in the effective recovery of top coal.
放顶煤回采工艺参数的合理选取，对顶煤的有效回收起着重要的作用。
Coal reserves in the nation's top coal fields throughout the province for more than 80 percent of counties and cities.
煤的藏量居全国首位，煤田遍及全省80%以上的县市。
On the basis of analyzing stress shell, the mechanical essence that top coal performs a function of bedding is demonstrated.
基于对应力壳体的发现和开展的一系列分析，揭示了综放采场顶煤“垫层”作用的力学本质。
The rock movement between the horizontal section of the top coal caving and inclined slicing of the top coal caving was analyzed.
运用相似材料模拟和数值计算的方法，对水平分段和倾斜分层放顶煤开采引起的围岩移动特征进行了比较。
The thickness and physics mechanics nature of rock parting have important influence on the stress distribute and its movement of top coal.
夹矸层的厚度及物理力学性质对顶煤的应力分布和移动有重要影响；
A high or low coal recovery rate of the top coal caving mining is related to the key technology of the coal mining method to be widely applied.
放顶煤开采煤炭回收率的高低是关系到能否推广这种采煤方法的关键技术。
In order to ensure safety and top coal caving in time, the measures of pre-blasting or water pre-infusion to weaken top coal should be adopted.
为确保安全和顶煤及时垮落，应实施预爆破或预注水弱化顶煤措施。
Through numerical simulation and analysis, the top coal movement and stress distribution in mechanized top caving mining of thick coal seam is revealed.
通过数值模拟分析，提示了厚煤层综放开采时顶煤运移和应力分布规律。
It is proven that the technique of the top-caving with vibration can easily destroy the arch structure, resulted in improving the top coal recovery ratio.
验证了振动放顶煤技术原理及其机构的可行性，证明了采用振动放顶煤技术可有效地提高顶煤采出率和降低混矸率。
This paper introduces the base demand of back and forth conveyors in fully mechanized top coal caving work face, and introduces how to decide involved size;
介绍了在综采放顶煤工艺条件下，对工作面前、后部输送机的基本要求与有关配套尺寸的确定方法；
The paper provided the mechanics model of the multi strata arch structure in the top coal and pointed the related factors of the influence structure features.
并提出了顶煤体中“跨层拱”结构的力学模型，指出了影响结构特征的相关因素。
Based on the displacement curves of top coal with different strength, the fractal dimension of which is analyzed and calculated according to the box dimension.
本文根据不同煤体强度条件下综放开采顶煤的位移曲线，采用盒维数的分形计算方法对其进行了维数分析。
Base on the site observation and experimental research, the paper studied the top coal structure for the top coal caving mining in steep inclined seam sections.
在现场观测及实验研究基础上，对急倾斜水平分段放顶煤开采过程中顶煤体结构进行了研究。
The following research results are obtained: the top coal caving technique and increasing the resistance of the support can reduce the pressure on the coal wall.
研究表明：放顶煤开采、提高支架工作阻力可以减缓煤壁压力，煤体合理注水可以提高煤体黏聚力与抗剪强度，它们是防治极软煤层煤壁片帮的有效措施。
In early application of fully mechanized top coal mining, Spontaneous fire took place when the backout of fully mechanized top coal caving face was stopped mining.
在应用综放开采的初期，每当综放工作面停采回撤时，就会发生自燃发火。
A numerical example shows that this method is effective and easily to come into use in the fields of top coal caving mining and coal mining under water bodies in future.
算例的计算结果表明，该方法简单、快速，有望在放顶煤开采和水体下采煤中得到应用。
Mining high and support have influence on stress and displacement distribute of top coal, which offer the basic law of mechanical for top coal broken analysis and movement.
分析了采高和支架对顶煤应力和位移分布的影响，为顶煤破碎机理的分析和顶煤移动和运动规律的研究提供了依据。
The movement and breakage of top coal, especially its internal micro-fracture extension, are closely related to the movement regularity of its immediate roof and main roof.
顶煤的运移与垮落，尤其是内部微观裂隙的扩展，与其直接顶和老顶岩层的活动规律密切相关。
In the light of analogue test in laboratory, the stability of roof of fully mechanized working face with top coal caving is studied during withdrawing support at stop line.
通过实验室相似模拟试验，对综放面收尾撤架空间的顶板稳定性进行了研究。
First, based on similar material model test, top coal cave-in characters in steep and thick seam were studied as well as failure law of main roof and features of surface subsiding.
首先利用相似模拟实验研究了急斜特厚煤层顶煤的冒落特征、顶板的破坏规律，以及地表下沉的特点。
Based on the successful application of gob-side entry retaining at longwall top coal caving face, a new way for realizing intensive and high efficiency is put forward in thick seams.
综放沿空留巷技术研究成果的成功应用为综放工作面实现集约化高效生产开拓了新路。
During mechanical longwall top coal mining, the gas permeability in top coal ahead of working face has bigger difference compared with slice mining due to the increase of mining height.
综放开采由于采高的加大，导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异。
On the basis of summarizing testing effects, the extension of crack and the breaking mechanism of top coal caving in steep seam have been analyzed by applying fracture mechanics theory.
在总结现场试验效果的基础上，应用断裂力学理论分析了急倾斜煤层巷道放顶煤顶煤破断裂纹的扩展和破碎机理。
Simulation testing and theoretical analysis were made to study generating mechanics and moving evolutionary process of "granular arch" structure of upper immediate roof in top coal caving.
通过相似模拟实验和理论分析，研究了综放条件下上位直接顶“散体拱”结构的形成机理和移动演化过程。
With the similar simulation test, a simulation study on the mining rate of a coal mining with the top coal weaken in different degree and under the high cutting mining condition was conducted.
通过相似模拟试验，对大段高开采条件下顶煤体靠底板侧煤体弱化程度不同情况下的工作面采出率进行了模拟研究。
The paper studied the gateway layout, the sectional top coal height and the coal mining technology of the coal mining method. Then the gateway and pillar top coal caving technology was developed.
对该采煤方法的巷道布置、阶段顶煤高度以及回采工艺进行了研究，形成了巷柱式放顶煤开采技术。
The experiments indicate that the control parameters of crack development induced by hydraulic fracturing have practical meaning for improving the effect of prefracturing design for hard top coal.
试验表明，本文结果中水压裂缝扩展控制参数对改善顶煤预裂设计效果具有实际意义。
The experiments indicate that the control parameters of crack development induced by hydraulic fracturing have practical meaning for improving the effect of prefracturing design for hard top coal.
试验表明，本文结果中水压裂缝扩展控制参数对改善顶煤预裂设计效果具有实际意义。
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