| 高温巷道调热圈特性及对隔热支护结构的影响 |
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| 引用本文： | 张树光,常剑,王宏伟.高温巷道调热圈特性及对隔热支护结构的影响[J].煤田地质与勘探,2019,47(5):179-185. |
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| 作者姓名： | 张树光 常剑 王宏伟 |
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| 作者单位： | 辽宁工程技术大学土木工程学院;辽宁工程技术大学安全监察学院 |
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| 基金项目： | 国家自然科学基金项目（51604142，51574141） |
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| 摘 要： | 为了研究高温巷道下围岩-隔热支护体系温度场的分布情况，基于围岩散热、能量守恒原理和异步长有限差分计算方法，建立了围岩-支护体系一维非稳态下的有限差分方程，编制相应解算程序，探讨了通风时间、围岩导温系数、温差、隔热层厚度和导热系数对围岩调热圈温度场的影响规律。研究结果表明:隔热层能延缓围岩散热和减少巷道风流对围岩的扰动，加快巷道降温；调热圈半径随通风时间增加、围岩导温系数增加、隔热层导热系数增加和厚度减少而增加。围岩温度梯度随通风时间增加而降低，随风流和原岩温差增大而增大；研究提高了对高温巷道调热圈特性及隔热结构的认知，对合理安排隔热支护有一定指导作用。
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| 关 键 词： | 高温巷道 有限差分 影响因素 调热圈 温度梯度 |
| 收稿时间： | 2018-11-06 |
Characteristics of heat-adjusting ring and the influence of thermal insulation support structure in high-temperature roadway |
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| Abstract: | To study the distribution of temperature field of surrounding rock-thermal insolating support system under roadway with high temperature, based on the heat dissipation of surrounding rock, the principle of conservation of energy and asynchronous long finite difference method, a one-dimensional unsteady rock-bolting system under finite difference equation was established and computer calculating program was compiled. The law of the influence of ventilation time, surrounding rock, temperature difference, heat insulation layer thickness and temperature conductivity coefficient of thermal conductivity of heat circle on the temperature field of surrounding rock has been found. The results show that the heat dissipation of surrounding rock is delayed and the disturbance of roadway air flow to surrounding rock is reduced, and the roadway cooling is accelerated:As the ventilation time increases, the confining pressure conductivity increases, the thickness of insulation layer decreases, and the thermal conductivity increases, the radius of the heat-adjusting ring increases. The temperature gradient of surrounding rock increases with the increase of ventilation time and the increase of temperature difference between wind and source rock. The cognition of heat-adjusting ring characteristics and heat insulation structure of high-temperature roadway is improved, which is helpful to arrange heat insulation support reasonably. |
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