Numerical modeling of hydrofracturing in a multilayer coal seam

The mathematical model of the process for hydrodynamic fracturing in a multilayer coal seam is proposed. The model is based on the equation of continuity and Darcy’s law. The filtration — temperature analogy allows solving the obtained non-linear, non-stationary problem in an axisymmetric statement for the pressure function as the heat-conductivity problem, by the finite-element method. The calculation results yield estimation of the radius of degassing borehole influence zone. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 61–70, January–February, 2006.     

“三软”煤层巷道围岩变形破坏机理分析

从沉积岩石学和工程地质力学的观点出发，以显德汪矿的软岩巷道为研究对象，进行了大量岩石物理力学性质试验，深入研究了岩石物化、水理性质，探讨了地应力对软岩巷道的控制作用，得出了软岩巷道变形破坏力学机制的新认识。     

浅埋煤层厚积砂薄基岩顶板破断机理研究

本文在物理相似模拟和数值模拟的基础上，通过对神东集团薄基岩浅埋煤层开采的研究，建立了上覆岩层的梯度复合板力学模型。利用承压砌块模型分析了周期来压过程，并给出了初次来压和周期来压机理。     

Investigation into the Gas-Dynamic State of a Coal Seam under Degassing and Moistening

The Statistics is cited for the violation of gas and dust conditions in mines of Russia and the material damage caused by gas and dust explosions. It is shown that degassing and moistening of a seam is the most efficiently conducted by the hydraulic pulse action. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 86–96, March–April, 2005.     

To the intensity of gas blowers in headings

The regularities of the gas flow formation under technogenic methane blower in a mine working are considered. Comparing the results of the numerical and analytical solutions to the problem on the filtration gaseous transfer has permitted to identify specific time periods of each event, conditioned by coal properties in the breakage zone entirely, including a face slip zone, and associated with the gas release delay as a result of a sudden face slip. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 40–47, November–December, 2006.     

槽波地震在东北地区的应用

介绍了槽波技术的原理及在东北地区几个矿的应用情况。     

轴向柱塞泵松靴故障特征信号的分析与选取

通过对轴向柱塞泵产生松靴故障的机理分析 ,选取振动信号和油液温升信号作为监测参量 ,分析研究表明 ,泵壳体振动信号和外泄口油液的温升信号是轴向柱塞泵松靴故障的敏感特征参量     

煤流自动喷雾洒水装置设计使用

盘江煤电(集团)公司新井开发公司金一采区目前采煤工作面主要集中在7#、9#等三软煤层,在生产过程中产生粉尘大,成为生产过程中的一大安全隐患。为了加强综合防尘的治理工作,有效将煤尘降低到最低限度,针对现场实际状况,新井公司采煤一区设计使用了煤流自动喷雾洒水装置,配合运输设备转载点喷雾使用,防灭尘工作取得明显效果,有效地解决了运输设备及运输巷的煤尘问题,为安全生产提供了有力保障。     

如何实现薄煤层工作面高产高效

新兴煤矿根据薄煤层的具体情况,采取针对性生产技术措施,在平均厚度不足1.0m的煤层中,实现了高产高效。     

煤层开采覆岩变形与破坏试验研究

顶底板赋存含水层的煤系地层在采煤影响下可能因导水裂隙的发育而导致突水危险。采用平面模拟的方法，通过实验室相似模拟试验，对某井田采煤过程中覆岩变形与破坏规律进行了模拟试验研究，获得了上覆岩层应力的分布以及随开采面推进的发展规律，结果表明，在本模拟条件下煤层开采导致上部覆岩破裂带触及上部含水层，因此需采取必要措施，以确保安全生产。