SU1165790A1 - Method of enhancing stability of excavation working - Google Patents

Description

The invention relates to the mining industry and can be used in the underground mining of mineral deposits, the underlying, layers of small and medium power with hard to destroy roofs.

The purpose of the invention is to reduce the load on the lining of production from the hanging console rocks of the roof and reducing the consumption of concrete solution.

FIG. 1 shows a system of; work · s. preserved 'after the passage of lava by excavation production, plan ⁴ , fig 2, section aa-a in figure 1 *, figure 3 - section bb in fig. one.

The development system contains you-. capacitive production 1, saved after the passage of lava on the border of the mineral massif - the developed space, lava 2, created before the approach of the lava belt 3 hardened rocks, bore-holes 4 for the introduction of reinforcing solutions, pump installation 5. for injection of reinforcing solution, rigid lining 6, section 7 mechanized roof supports with the fencing removed and equipped with retractable visors 8, zone 9 unbroken non- 'rocks

"To" 7.

1165790

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Fig.Z

Claims (1)

METHOD OF INCREASING THE STABILITY OF THE EXTRACTIVE EXTRACT, including maintaining mining at the border of the mineral massif developed space in hard-to-damage roofs, hardening the surrounding rock formations by pumping reinforcement mortar, in order to reduce the load on the roof structure of the suspended concrete , the hardening of the production rocks is carried out before the approach of the cleaning face through a distance equal to the step of collapse of the main roof in the form of s, while after the crossing zone in places lava recess formation rock below the belt mounted stiffener. Storage device „1165790 1165790 2 mediocre roof, belt 10 reinforced rocks, perceiving the load of the cantilever of the main roof, line of collapse of the main roof 11. 5 - In excavation development 1 before the approach of lava 2 through distances equal to the collapse of the main roof of the reservoir, a complex of works is carried out to create a belt 3 of reinforced 10 along the contour of the excavation. For this, boreholes 4 are drilled through which, using a pumping unit 5, a reinforcement solution is injected into the massif surrounding the production. After 15. the passage of lava to maintain the bearing capacity of the hardened belt of rocks in the place of the rupture of the belt after excavation of the mineral layer establish a rigid lining 6. 20 Hard roofing is installed from under the sections of mechanized roof supports 7 with the fencing removed, equipped to provide work safety with retractable visors 8. The proposed method allows to reduce the consumption of the hardening solution and reduce the complexity of maintaining excavation production at the 30th border of the mineral array, the developed space by increasing its stability. . one