The paper also gives the range of stability of key block of voussoir beam and measures to be taken in various conditions.
文中还给出了“砌体梁”关键块体结构的稳定范围及在各种条件下应采取的相应措施。
Through the analysis of jig, the air operated jig was used which is composed by the voussoir-roller aggregate unit to solve the present production problems.
通过对夹具的分析，决定采用由楔块-滚柱联动机构组成的气动夹具来解决生产中的实际问题。
The major factors that affect the stability of the structure are rotational angle of the voussoir beam, ratio of length and height, rock type and height of carrying rock strata.
块体的回转角、长高比、岩性及负载岩层的高度是影响结构稳定的主要因素。
Theoretical Analysed the roof without voussoir beam structure in shallow seam mining under thick unconsolidated layers, thus, cann't use voussoir beam theory to compute the force of supports.
同时，理论分析了地表厚松散层浅埋煤层顶板不存在砌体梁结构，因而不能应用砌体梁理论计算支架载荷。
The relieving platform limits the sliding plane, and the sliding mass at this time is no longer a voussoir, so, Rankine theory and Coulomb theory cant be applied to calculate the earth pressure.
减压平台限制了墙后滑动面，此时滑动土体不再是一个楔体，无法采用朗肯理论、库仑理论计算土压力。
The relieving platform limits the sliding plane, and the sliding mass at this time is no longer a voussoir, so, Rankine theory and Coulomb theory cant be applied to calculate the earth pressure.
减压平台限制了墙后滑动面，此时滑动土体不再是一个楔体，无法采用朗肯理论、库仑理论计算土压力。
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