UC知道帮帮翻一下 阿
来源：百度知道 编辑：UC知道 时间：2024/06/02 00:47:38
Causes of floor heave and sides closure along the gate roads
Inherent weakness of the rock
The floor beneath the coal seams is usually underclay. It consists of clay minerals with abundant randomly oriented stigmarian rootlets, carbonaceous layers and sometimes pyritic nodules [4]. The underclay thus formed has low uniaxial compressive strength values in the range of 10-18 MPa [5,6]. This soft rock is usually slickensided which promote flow of the floor under relatively low strata pressure [7].
Effect of water
There are 5 main groups of clay minerals present in the underclay floor of the coal seams. These are: kaolinite, montmorillonite, illite, chlorite and vermiculite. These minerals, especially the first two, have great water absorbtion properties, of up to 3 times their dry volume, with resulting swelling, cracking anddisintegration of the rock mass.
Ground pressure
This is one of the main factors causing deformation and consequently floor heave and si
Inherent weakness of the rock
The floor beneath the coal seams is usually underclay. It consists of clay minerals with abundant randomly oriented stigmarian rootlets, carbonaceous layers and sometimes pyritic nodules [4]. The underclay thus formed has low uniaxial compressive strength values in the range of 10-18 MPa [5,6]. This soft rock is usually slickensided which promote flow of the floor under relatively low strata pressure [7].
Effect of water
There are 5 main groups of clay minerals present in the underclay floor of the coal seams. These are: kaolinite, montmorillonite, illite, chlorite and vermiculite. These minerals, especially the first two, have great water absorbtion properties, of up to 3 times their dry volume, with resulting swelling, cracking anddisintegration of the rock mass.
Ground pressure
This is one of the main factors causing deformation and consequently floor heave and si
底鼓的原因和双方封闭道路沿线的门
内在弱点岩石
地板下面的煤层通常underclay 。它包含丰富的粘土矿物随机面向stigmarian根，碳质层，有时硫铁矿结核[ 4 ] 。从而形成了underclay低单轴抗压强度值范围在10月18日压力[ 5,6 ] 。这通常是软岩slickensided促进流动下发言相对较低地层压力[ 7 ] 。
水的影响
有5个主要群体的粘土矿物中存在underclay层的煤层。这些国家是：高岭石，蒙脱石，伊利石，绿泥石和蛭石。这些矿物质，尤其是前两个，有很大水分的吸收性能，最高3倍的干量，造成肿胀，开裂anddisintegration岩体。
地面压力
这是一个主要因素造成变形，因此底鼓和双方结束。这种现象主要是相对中遇到的深门的道路，有超过700米深度覆盖。巷道位于残余支柱还经验substential楼电梯由于存在区的高地上的压力预计来自周边的支柱向下的角度骨折表示如下[ 5,6 ] ：
β =代数k [ （ π / 4 ） + （ Φ / 2 ） ] （ 1 ）
其中β =平均骨折角度地面水平。 （ = 24-40 ° ;见图。 1 ） ; Φ =平均角的内部摩擦复合地层的横向（ = 10月30日° ） ; k -常数有关实验室单轴试验结果的完整岩石样本原位测量岩体（ = 0.4-0.8 ） 。