Kharin s.a.

Research of speed of main crossheadings

at building of deep mines

We investigate dependence of speed of driving of main crossheading, located on horizon of the 2th stage of dissection of deposit. In this case takes place considerable (in 3 and more than time) reduction of length of crossheadings as compared to their sizes on horizons of the 1th stage of dissection, especially on no-bottoms.

At specific gravity of time of driving of making of main direction of horizon in general duration of works on dissection and building of deposit by the 2th stage of dissection 0,6 takes place following.

At time of building of horizon 108 months (Table 1) and on condition of maintenance of speed of driving of drift (v_s) at the level of 10 m/month, vent crossheading (v_vkv) of 10 m/month, notches and arrivals (v_z) also 10 m/month and ore court of main and flanking barrel of 250 m³/month for providing of the set time of driving of horizon it will be necessary to provide speed of driving of main crossheading of 132 m/month, that appears very difficult and practically not realized, having regard to both large area of cross-sectional of this type of making and high fortress of breeds building is conducted in which.

Further, to some level, at low values small change of rates of building of drift, at a maintainance at former level of speeds of driving of other making conduces to the fall-off of the required speed of driving of main crossheading. At growth of speed of leadthrough of drift from 15 to 20 m/month and other equal terms speed of driving of main crossheading goes down to 20,2 m/month or in 6,53 time as compared to the case of v_s = 10 m/month and in 1,4 time as compared to the case of v_s = 15 m/month.

Here it should be noted that, as far as growth of level of speed of driving of drift, other things being equal, intensity of decline required for providing of building of horizon in the set term of speed of driving of main crossheading at the equal intervals of growth of speed of driving of drift (there is this interval of 5 m/month in our case) will diminish. So, for example, at v_s = 30 m/month speed of leadthrough of main crossheading will be already only in 1,17 time below, than at v_s = 25 m/month. By an especially model in that behalf there is a case of comparison at v_s = 45 m/month and v_s = 50 m/month, when speed of driving of main crossheading goes down from 13,8 to 13,4 m/month or in 1,03 time.

Table 1

Speeds of building of the mountain making

Main crossheading, m / months	Drift, m / months	Vent crossheading, m / months	Notches and arrivals, m / months	Оre court of main barrel, m^3 / months	Оre court of flanking barrel, m^3 / months
Time of building of horizon is 108 months
132	10	10	10	250	250
28,2	15	10	10	250	250
20,2	20	10	10	250	250
17,3	25	10	10	250	250
49,5	10	10	10	400	400
7,43	20	20	20	400	400
Time of building of horizon is 86,4 months
107	30	10	10	250	250
74,8	35	10	10	250	250
61,1	40	10	10	250	250
14,7	20	20	20	250	250
11	25	25	25	250	250
Time of building of horizon is 43,2 months
96,3	40	35	30	250	250
78,7	45	35	30	250	250
68,6	50	35	30	250	250
24,3	50	50	50	400	400
14,1	100	100	100	600	600
Time of building of horizon is 36 months
115	45	50	50	250	250
94,8	50	50	50	250	250
43,1	50	50	50	400	400
29,9	100	100	100	250	250
21,7	100	100	100	400	400
18,8	100	100	100	600	600

In this connection it should be noted that for maintenance technically of the acceptable to the certain terms of speed driving of the most difficult making – main crossheading – expediently substantial not increase of rates of leadthrough some one from a number other making of horizon, but comparatively even, but not so high, change of level of driving of all types of making.

Fig. 1. It is dependence of speed of main crossheading on time of building of horizon

Taking into account more high volume of works on the leadthrough of a vent crossheading among other extensive making of horizon it is necessary to mark large meaningfulness of this type of making for providing of one or another level of driving of main crossheading. So, for example, speed last at v_s = 20 m/month, v_vkv = 10 m/month and v_z = 10 m/month there will be 20,2 m/month, but at combination of v_s = 10 m/month, v_vkv = 20 m/month and v_z = 10 m/month it will be only v_gkv = 15,7 m/month, and at v_s = 10 m/month, v_vkv = 10 m/month and v_z = 20 m/month there will be 20,2 m/month needed already considerably more high-rate of main crossheading of 42 m/month obviously, that for providing of certain level of driving of main crossheading the rates of leadthrough of a vent crossheading are most essential, in less – notches.