这些碗盘是放顶架上的。
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。
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.
在高瓦斯矿井中，炮采放顶煤工作面的瓦斯治理工作一直是个难题，它严重制约着煤矿的安全生产。
Gas management is a difficult problem at the blasting and caving face in high gas mine. It restricts the safe production of coal mine.
论述了在复杂地质条件地块(如冲击地压、小断层、受下伏煤层采动影响)采用放顶煤工艺的成功实践。
This paper illustrates the successful practice of using caving coal process in complex geological conditions, such asi impact groud pressure, small fault, mining influence.
论述了顶煤介质状态转化对工作面支架的作用，不同强度顶煤在工作面控顶区上方的性态分布和放顶煤线处的垮落特点；
The loading affection on supports in process of transformation. the roof coal behaviour on the face zone and its caving character at cavity edge are expounded.
对影响悬移支架放顶煤技术成功应用因素进行了系统分析，并总结出了其主要影响因素。
This paper analyzes the success application influence factors about the roof caving technology of cantilever support and summarized it's main factors.
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。
The rational selection of the technique parameters played an important role in the effective recovery of top coal.
对陕西火石咀煤矿厚煤层放顶煤开采自然发火原因进行了分析，并提出了合理的防治措施。
The paper analyzes the causes of spontaneous ignition in caving mining in Shaanxi Huoshizui coal mine and puts forward reasonable prevention measures.
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。
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.
该文通过事故案例分析，提出了炮采放顶煤工作面顶板控制的基本要求和预防顶板事故发生的有效措施，有一定借鉴意义。
The case of accidents, the proposed blasting mining roof caving face the basic requirements for control and prevention of incidents of roof effective measures, must learn.
在矿区铁路下进行放顶煤开采所引起的地表及铁路的变形量大，变形速度快，从而导致矿区铁路维护困难。
The fully mechanized caving coal mining under the railway in mine area will result in difficult maintenance of railway because of great deformation and subsidence speed of terrene and railway.
放顶煤工作面与非放顶煤工作面的区别是，采空区充填系数小，顶板岩层运动剧烈，走向方向超前支承应力峰值较大。
The differences between the coal drawing face and non-coal drawing face are low stowing factor in the goaf, vigorous movement of roof, and high stress peak abutment pressure along the strike.
同时研究本分类系统软件在综采放顶煤工作面顶煤的可放性诊断、支架选型和放煤机构设计中的应用。
And study the classification system application in diagnosing the caving and drawing characteristics of top-coal, choosing support and designing drawing mechanism.
文章阐述了采场薄板矿压理论建模的基本思想、立论依据、理论成果及其在煤层的普通开采和放顶煤开采中的实际应用情况；
The paper reviews state of the art ground pressure theory of thin slab in coal mining such as scientific concepts, foundation argumentation, theoretical development and the field application.
对综采放顶煤工作面自燃发火的原因进行了分析，阐述了所采取的综合性预防措施，及取得了良好的效果。
The reason of the spontaneous combustion at fully mechanized workface with top caving are analyzed. The comprehensive preventing measures are elaborated. The good effect is obtained.
具突出危险性的厚煤层采用综采放顶煤开采法对消突是有积极作用的。
Finally, the paper considers that the fully mechanized coal caving mining is helpful to control outburst hazard.
结果表明，放顶煤采煤法其支承压力分布形式与分层开采法类似，但在量值及影响范围上有增减。
The result indicated That the abutment pressure distribution form was similar to that of slicing mining method but its magnitude and affecting range changed.
介绍轻型放顶煤液压支架(下文简称轻放支架)配套平板车的设计过程及轻放支架在煤矿地面、井下的运输过程。
This paper introduces the design of light-duty roof caving coal hydraulic support equipped with flat tramcar and transportation on ground and under ground.
在鹤岗矿业集团公司应用综采放顶煤采煤法，取得了良好的经济效益。
We have got good economic benefit by adopting the apply of multiple ceiling coal mining in the Mine Block of Hegang.
分析了确定综采放顶煤开采工艺易发火地区及发火原因。
The easy ignition area in compound mining caving coal process and reason are analyzed and determined.
针对这一情况，从药室爆破放顶充填采空区，从而达到分层崩落法采矿的护顶层要求。
Based on this case, through filling the gob area by means of chamber blasting, the requirement of protective top - layer for slicing and caving can be achieved.
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。
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.
首次将顶煤的分类与直接顶、老顶的分类结果相结合，弥补了原有顶板分类方案不适合放顶煤采场的不足。
Combine top-coal classification with roof classification for the first time, which make up the inadequate of former classification program.
在综采放顶煤工作面顺槽掘进过程中，由于顺槽煤层顶板松动破碎，并且顺槽采用矩形断面，顶板跨距较大，不利于巷道支护。
During the drivage of main-gate in long-wall face with fully mechanized caving mining, the gate is hard to support due to its loose and broken roof, large cross-section and long span.
综采放顶煤技术已成为厚煤层开采的高产高效采煤技术。
Fully mechanized caving mining has became mining technology of high output and efficiency in thick coal seam mining.
由于工作面初次放顶没有完成，顶板巷道、顶板钻孔等不能发挥作用，常发生瓦斯超限现象，必须采取针对性措施。
Because the first caving of work face haven't been finished, the tunnel roof and hole can not be used and gas often goes beyond the limit, so some measures must be taken.
同时，放顶煤综采工作面的瓦斯治理也是世界各国煤矿瓦斯灾害防治技术的薄弱环节。
Simultaneously, the gas control in roof caving and fully mechanized mining is the unsubstantial aspect of prevention measures for gas disasters in all over the world.
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 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 rock movement between the horizontal section of the top coal caving and inclined slicing of the top coal caving was analyzed.
应用推荐