放顶煤工作面煤岩活动特点及其顶煤破碎机理

本文结合我国放顶煤开采的实践,对放顶煤工作面顶煤的破碎和移动规律及上覆岩层的活动规律进行了研究,指出了开采深度、煤层强度、支架支护强度及煤层厚度等是影响顶煤破碎和放顶煤效果的主要因素。同时指出了顶煤的破碎是顶煤与上覆岩层相互作用的结果,而支架仅起辅助破煤的作用。并在此提出了顶煤破碎分区。     

回采工作面放顶煤数学模型的建立

通过相似模拟实验研究,本文针对煤矿放顶煤回采工作面特点,提出了对放煤效果影响最大的三个主要因素:煤层垮落角(α)、放煤高度(h)及放煤口到煤断线水平距离(l_0)。并发现,在放煤过程中,由于受α、h、l_0值影响,放出体非但不是一个完整椭球体,而且放出体轴线也要发生偏转。在此基础上建立了煤矿放顶煤的数学模型,为放顶煤回采工艺建立了必要的理论基础。     

夹矸对放顶煤开采的影响

厚煤层存在夹矸层是较为普遍的现象，而夹矸层对顶煤冒放性的影响则是研究顶煤冒放性问题的一个重要方面。今根据煤层中夹矸层赋存特征（层位、层数、厚度）和岩石力学性质（岩性、强度），详细分析了夹矸特性对顶煤冒放性的影响。在此基础上，结合放顶煤开采的要求，提出了夹矸层的临界厚度参数值范围。     

放顶煤开采顶煤冒放性影响规律研究

从地质因素出发,用理论分析、现场实测研究和数值模拟方法详细探讨了开采深度、煤层的厚度和强度、煤层中的夹石层厚度及强度、直接顶的岩性及厚度、老顶的岩性及厚度、煤体的裂隙发育程度等因素对顶煤冒放性的影响规律,并给出了影响因素的临界值。     

提高硬煤层放顶煤工作面回收率的研究

本文介绍了七五煤矿悬移支架放顶煤工作面顶煤破碎冒落规律，叙述了顶煤爆破和松动方法及参数优化，此法是煤质硬煤层放顶煤面控制块度，提高回收率的一种有效方法。     

厚冲积含水层下悬移支架放顶煤开采可行性探讨

以曹庄煤矿的煤层赋存条件为依据，从放顶煤支架的选型、放顶煤开采的充分性和技术经济性等三个方面，对厚冲积含水层下悬移支架放顶煤开采的可行性进行了探讨。     

滑移支架放顶煤工作面煤岩活动特点及其控制

本文结合我国滑移顶粱液压支架放顶煤开采的实践，对滑移支架放顶煤工作面顶煤的玻碎和放出规律进行了研究，指出工作面长度、煤层强度、开采深度及煤层结构等是影响顶煤破碎和放出效果的主要因素，同时指出顶煤的玻碎是顶煤与上覆岩层相互作用的结果，而支架仅起辅助破煤的作用。     

滑移支架放顶煤工作面煤岩活动特点及其控制

本文结合我国滑移顶梁液压支架放顶煤开采的实践，对滑移支架放顶煤工作面顶煤的破碎和放出规律进行了研究，指出工作面长度，煤层强度、开采深度及煤层结构等是影响顶煤破碎和放出效果的主要因素，同时指出顶煤的破碎是顶煤与上覆岩层相互作用的结果，而支架仅起辅助破煤的作用。     

喷雾降尘技术在放顶煤综采工作面的应用

根据在轩岗矿区５＾＃“三软”特厚缓斜煤层采用放顶煤综采工作面进行的综合防尘试验和分析研究结果，对采煤机内、外喷雾及放顶煤液压支架自动喷雾降尘所涉及的有关喷雾降尘的技术问题作了进一步的探讨。     

演马庄煤矿突出煤层炮采放顶煤工作面防治煤与瓦斯突出的方法和措施

介绍了演马庄煤矿 2 70 2工作面突出煤层炮采放顶煤效果检验的方法和防止煤与瓦斯突出所采取的措施 ,提出突出煤层炮采放顶煤工作面瓦斯抽放是防止煤与瓦斯突出的有效手段 ,当工作面有煤与瓦斯突出危险时 ,采取恰当的防突措施 ,能够降低煤与瓦斯突出的危险程度 ,可供同类工作面回采时借鉴     

永城城郊矿区二_2号煤层厚度变化及其对煤矿生产的影响

笔者利用178个钻孔资料编制的二_2号煤层等厚线图表明,煤层为厚薄相间的条带状,大致南北向展布,平均厚度2.95m,系一中厚煤层。影响其厚度变化的主要因素系沉积环境和古地形,另外河流后生冲刷、沼泽基底不均衡沉降、构造和岩浆的侵入等在局部地区对二_2号煤层厚度也有影响.煤层厚度的变化影响采掘部署、造成采掘失调、降底回采率、增加煤厚的研究与探测工作等。     

焦作九里山矿单体支柱放顶煤工作面顶煤运动放出规律浅析

通过焦作矿务局九里山矿单体支柱放顶煤工作面现场实测, 得出单体支柱放顶煤工作面顶煤运动、破碎、放煤过程中煤流动态及放出椭球体规律, 为确定合理放顶煤工艺参数提供了可靠的依据． 合理的放煤工艺参数不但提高了回收率, 而且保证了工作面正常生产, 这对焦作矿区今后采煤方法的改革具有重要的指导意义     

论煤炭地下气化对煤层地质条件的适应性

分析了煤层埋藏深度、厚度、倾斜度、围岩等地质条件对井工法和地下气化法开采的影响，阐述了煤炭地下气化较大的适应性。     

Technical parameters of drawing and coal-gangue field movements of a fully mechanized large mining height top coal caving working face

Under fully mechanized, large mining height top coal caving conditions, the shield beam slope angle of the support increases due to the enlargement of the top coal breaking and caving space. This results in a change of the caving window location and dimensions and, therefore, the granular coal-gangue movement and flows provide new characteristics during top coal caving. The main inferences we draw are as follows. Firstly, after shifting the supports, the caved top coal layer line and the coal gangue boundary line become steeper and are clearly larger than those under common mining heights. Secondly, during the top coal caving procedure, the speed of the coal-gangue flow increases and at the same drawing interval, the distance between the coal-gangue boundary line and the top beam end is reduced. Thirdly, affected by the drawing ratio, the slope angle of the shield beam and the dimensions of the caving window, it is easy to mix the gangue. A rational drawing interval will cause the coal-gangue boundary line to be slightly behind the down tail boom lower boundary. This rational drawing interval under conditions of large mining heights has been analyzed and determined.     

顶煤冒放性及其预测分类研究

运用相似材料模型试验，提出了顶煤冒放的桥拱式、半拱式和柱式３种结构特征；分析了影响顶煤冒放性的主要因素；运用数值方法得出了各因素的影响规律、主次排序和权重；基于模糊数学理论，提出了预测顶煤冒放性的分类方案．并运用全国２９个主采煤层的分类结果验证了分类方案的正确性和实用性．     

综采放顶煤步距的一种理论确定方法

结合实际分析了顶煤放出过程中矸石混入的特点,在此基础上给出了综放步距的计算式,并应用于潞安矿务局３号煤层综放工作面,对综放开采参数优化有所裨益．     

Arch structure effect of the coal gangue flow of the fully mechanized caving in special thick coal seam and its impact on the loss of top coal

Based on the characteristics of the top coal thickness of the fully mechanized caving in special thick coal seam,the long distance of coal gangue caving,as well as the different sizes of the coal gangue broken fragment dimension and spatial variation of drop flow,this paper uses laboratory dispersion simulation experiment and theoretical analysis to study the arch structure effect and its influence rule on the top coal loss in the process of coal gangue flow.Research shows that in the process of coal gangue flow,arch structure can be formed in three types:the lower arch structure,middle arch structure,and upper arch structure.Moreover,the arch structure has the characteristics of dynamic random arch,the formation probability of dynamic random arch with different layers is not the same,dynamic random arch caused the reduction of the top coal fluency;analyzing the dynamic random arch formation mechanism,influencing factors,and the conditions of instability;the formation probability of the lower arch structure is the highest,the whole coal arch and the coal gangue arch structure has the greatest impact on top coal loss.Therefore,to prevent or reduce the formation of lower whole coal arch structure,the lower coal gangue arch structure and the middle whole coal arch structure is the key to reduce the top coal loss.The research conclusion provides theoretical basis for the further improvement of the top coal recovery rate of the fully mechanized caving in extra thick coal seam.     

Damage statistical mechanics model of top coal in steep top caving coal

Damage statistical mechanics model of horizontal section height in the top caving was constructed in the paper. The influence factors including supporting pressure, dip angle and characteristic of coal on horizontal section height were analyzed as well. By terms of the practice project analysis, the horizontal section height increases with the increase of dip angle β and thickness of coal seam M. Dip angle of coal seam β has tremendous impact on horizontal section height, while thickness of coal seam M has slight impact. When thickness of coal seam is below 10m, horizontal section height increases sharply. While thickness exceeds 15m, it is not major factor influencing on horizontal section height any long.     

邯邢煤田陶庄矿区山西组煤层厚度及煤质特征与沉积环境的关系

对陶庄矿区山西组研究结果表明:山西组为浅水三角洲沉积,大煤(2号煤)形成于废弃的三角洲朵体,其厚度分布主要受泥炭堆积期后河流冲刷作用的影响,沼泽水位的变化影响了煤的灰分分布;小煤(1号煤)形成于三角洲平原堤后沼泽,下伏河道砂岩(S_3)的展布形态控制了小煤厚度的分布,泥炭堆积期的河流溢岸作用是影响小煤灰分分布的主要因素。     

急倾斜放顶煤矿压显现规律的观测与研究

通过对宜洛煤矿李沟井伪俯料放顶煤回采工作面的矿压观测,从4个方面研究了急倾斜伪俯斜放顶煤工作面矿压显现规律;（1）工作面的初次来压、周期来压步距和来压强度;（2）沿工作面走向控制区内的顶板压力状况,以及生产工序对控制区内支柱载荷的影响;（3）研究了沿倾斜方向矿压显现特点,分析了与近水平煤层矿压显现不同的原因;（4）观测了上下巷矿压显现规律,并分析了上下巷压力不同的原因．用统计法对伪俯斜放顶煤采煤法和分层开采上下巷矿压显现作了对比。