CN1470740A - Big-interval bottom-column-free sectional caving stoping method - Google Patents

Abstract

The present invention relates to a large-space sublevel caving method, in concrete, it is a large-space sublevel caving method free from base column, according to the sublevel height, driving space and ore-caving step a relationship formula of mining parameters can be made. Said relationship formula can be refered to patent specification. Said invention is mainly used for mining underground mine.

Description

Big-interval bottom-column-free sectional caving stoping method

One, technical field

The present invention relates to a kind of underground mining technology, particularly a kind of big-interval bottom-column-free sectional caving stoping method.

Two, background technology

At present in the exploitation of China's underground mine, adopt the output of bottom-column-free sectional caving stoping method to account for China's more than 80% of total amount of underground mine exploitation, these mining methods are that the unit carries out back production between dividing with explosion, height between branch, wide, thick three degree are of a size of its main structural parameters, are called the high H of segmentation, drift interval L, ore caving interval.The ore deposit rock spatial shape that the back production ore removal is emitted can be described with spheroid approx, is called and emits body.Its major semiaxis is a, and semi-minor axis is b.Domestic mine is subjected to the influence of traditional draw theory, continue to use the structural parameters of the high H of segmentation more than or equal to drift interval L always, because it is bigger in technologic difficulties such as rock drilling, powder charge, explosions to strengthen height of lift, so structural parameters very much not get up all the time, the main minor structure parameter that adopts of China's mining at present, labor productivity is low, and cost is also high.

Three, summary of the invention

The technical issues that need to address of the present invention are: under the condition that guarantees safety in production, strengthen structural parameters.Technical scheme of the present invention is: big-interval bottom-column-free sectional caving stoping method, formulate the mining parameter relationship according to segmentation height, drift interval, ore caving interval, emitting body is the ellipsoid shape, its major semiaxis is a, semi-minor axis is b, it is characterized in that: emitting body with five is a combination substantially, five emit body in the space 9 tangent, the ratio of the mining high H of parameter segmentation and drift interval L satisfies: $H/L=3\sqrt{2}/16\×a/b.$ The invention has the beneficial effects as follows: strengthen drift interval, improved mining intensity, reduced mining tunnel, mining cost can decline to a great extent, and this invention also can be used for the transformation to existing mine.

Four, description of drawings

Fig. 1 is the big spacing three-dimensional model of a present invention structural representation front view

Fig. 2 is the big spacing three-dimensional model of a present invention structural representation left view

Five, the specific embodiment

With reference to Fig. 1,2, three-dimensional model is got five and is emitted the basic combination that body 1 is one group a minimum, five emit body 1 in the space 9 tangent, emit body 1 lower end and be (route) ore removal point 2, the vertical distance of two ore removal points 2 is the high H of segmentation, horizontal range is drift interval L, and the ratio of high H of segmentation and drift interval L satisfies: $H/L=3\sqrt{2}/16\×a/b.$ Specifically implementing with the meishan iron mine is example, is 15 meters * 15 meters with the segmentation height * drift interval that adopts originally, makes 15 meters * 20 meters into, and drift interval strengthens 33%, tunnels mining tunnel 25% thus less, can reduce mining cost more than 10%.

Claims (1)

1, big-interval bottom-column-free sectional caving stoping method, formulate the mining parameter relationship according to segmentation height, drift interval, ore caving interval, emitting body is the ellipsoid shape, its major semiaxis is a, semi-minor axis is b, it is characterized in that: emitting body with five is a combination substantially, five emit body in the space 9 tangent, the ratio of the mining high H of parameter segmentation and drift interval L satisfies: $H/L=3\sqrt{2}/16\×a/b.$

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