Study of Floor Heave Mechanism in Deep Soft Rock Roadway
نویسندگان
چکیده
منابع مشابه
Experimental research on the structural instability mechanism and the effect of multi-echelon support of deep roadways in a kilometre-deep well
We study the structural instability mechanism and effect of a multi-echelon support in very-deep roadways. We conduct a scale model test for analysing the structural failure mechanism and the effect of multi-echelon support of roadways under high horizontal stress. Mechanical bearing structures are classified according to their secondary stress distribution and the strength degradation of the s...
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According to the geological characteristics of Xinjiang Ili mine in western area of China, a physical model of interstratified strata composed of soft rock and hard coal seam was established. Selecting the tunnel position, deformation modulus, and strength parameters of each layer as influencing factors, the sensitivity coefficient of roadway deformation to each parameter was firstly analyzed b...
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The problem of roadway support in swelling soft rock was one of the challenging problems during mining. For most geological conditions, combinations of two or more supporting approaches could meet the requirements of most roadways; however, in extremely swelling soft rock, combined approaches even could not control large deformations. The purpose of this work was to probe the roadway deformatio...
متن کاملFloor Heave Mechanism of Gob-Side Entry Retaining with Fully-Mechanized Backfilling Mining
Serious floor heave in gob-side entry retaining (GER) with fully-mechanized gangue backfilling mining affects the transportation and ventilation safety of the mine. A theoretical mechanical model for the floor of gob-backfilled GER was established. The effects of the mechanical properties of floor strata, the granular compaction of backfilling area (BFA), the vertical support of roadside suppor...
متن کاملEffect of bolting on roadway support in extremely weak rock
In mine roadway support operations, floor bolting not only played a role in floor heave control, but also in reinforcing roof and its two sides. Correspondingly, bolting of roof and two sides also played a part in floor heave control. To quantify the effect of such bolting, based on roadway support in extremely weak rock, three physical models were produced and tested in laboratory. Through com...
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ژورنال
عنوان ژورنال: DEStech Transactions on Environment, Energy and Earth Science
سال: 2017
ISSN: 2475-8833
DOI: 10.12783/dteees/apees2017/7677