A total of workers 147 recruited in this examination, who were performed by spirometry 130, x ray 144. Their  86.4% were male, 23.7% female with age 37.2±9.9. Working years 5.97±5.57. The BMI were normal weight 37.2±9.9, underweight 4.2% (6), overweight 34.5% (49), obesity 16.2% (23), obesity III 4.9% (7).

X ray results were evaluated by guidelines for the use of the International Labor Organization international classification of radiographs of pneumoconioses (revised edition 2011).

Asthma and allergic diseases woman were higher than man and Pneumoconiosis were in man higher than woman (Table 1).

Disease incidence by gender                                        Table 1
Disease	Male % (n=127)	Female % (n=20)	Total % (n=147)
Underweight	4.2 (6)	0 (0)	4.2 (6)
Over weight	25.0 (5)	36.1 (44)	34.5 (49)
Obesity	16.4 (20)	15.0 (3)	16.2% (23)
Over obesity	2.5 (3)	20.0 (4)	4.9% (7)
Hypertention	37.4 (46)	25.0 (5)	35.7 (51)*
Chronic bronchitis	9.8 (12)	5.3 (1)	9.2 (13)
Asthma	2.4 (3)	21.1 (4)	4.9 (7) *
COPD	2.4 (3)	0 (0)	2.1 (3)
Allergic rhinitis	5.7 (7)	26.3 (5)	8.5 (12) *
Pneumoconiosis	19.2 (24)	5.3 (1)	17.4 (25)
Old tuberculosis of lung	4.1 (5)	0 (0)	3.5 (5)
			p<0.05

Work dust exposure divided into the 2 groups that was High exposure and low exposure. High exposure workers have working underground mining (drilling, blasting).  Low exposure workers have working packaging, grinding, washing and concentrating. High exposure group was younger than low exposure group but their working years higher than low exposure. Pulmonary function was same in groups.(Table 2).

Pulmonary function by working condition               Table 2
Өвчлөл	High exposure (n=48)	Low exposure  (n=82)	Total  (n=130)
Age (year)	33.3±6.8	39.9±10.7	37.2±9.9*
Gender (%, n)	42.3 (52)	10.0 (2)	37.8 (54)*
Working years (year)	7.02±3.7	5.2±6.4	5.9±5.6*
Smoking index (box/year)	179.4±198.5	164.0±218.0	170±210
Vital Capacity (VC) (%)	85.3±12.5	85.6±14.1	95.9±18.3
Forced Vital Capacity (FVC) (%)	98.8 ±19.5	94.3±17.4	79.1±13.4
Forced Expiratory Volume1 (FEV1)( %)	80.6±14.4	78.2±12.8	85.4±13.5
p<0.05

Forced Expiratory Volume One second was decreased by 80% workers had  59.2% (77)  which had  48.9% (23) in high exposure group and low exposure group had 65.2% (54) (Table 3).  

Disease incidence in working condition                               Table 3
Pulmonary function	High exposure % (n=47)	Low exposure % (n=83)	Total % (n=130)
VC<80%	29.8 (14)	31.5 (26)	30.8 (40)
FVC< 80%-иас буурсан	19.1 (9)	15.7 (13)	16.9 (22)
FEV1< 80%-иас буурсан	48.9 (23)	65.1 (54)	59.2 (77)*
			p<0.05

Chest x ray results were compared 2 groups. Costphrenic angle closed were higher in high exposure group. (Table 4).

Chest x ray results in working condition                    Table 4
Chest x ray	High exposure % (n=56)	Low exposure % (n=88)	Total  % (n=144)
Lung lucent	3.6 (2)	1.1(1)	2.1 (3)
Lung pattering increase	21.4 (12)	20.7 (18)	21.3 (30)
Hypertrophy left side of heart	12.5 (7)	18.4 (16)	16.1 (23)
Pleural thickening	1.8 (1)	2.2 (2)	2.1 (3)
Costphrenic angle	10.7 (6)	2.3 (2)	5.6 (8)*
			p<0.05

The chest x ray with nodular opacity (ILO 2011 guideline) high was in high exposure group. (Table 5).

Table 5 The chest x ray with nodular opacity in

The chest x ray	High exposure % (n=56)	Low exposure % (n=88)	Total  % (n=144)
No nodular infiltration	66.1 (37)	93.3 (81)	82.9 (118)
0/0	1.8 (1)	5.6 (5)	4.1 (6)
0/1	7.1 (4)	0.0 (0)	2.7 (4)
2/1	5.4 (3)	0.0 (0)	2.1 (3)
2/2	3.6 (2)	0.0 (0)	1.4 (2)
2/3	1.8 (1)	0.0 (0)	0.7 (1)
3/+	5.4 (3)	0.0 (0)	2.1 (3)
3/2	1.8 (1)	1.1 (1)	1.4 (2)
3/3	7.1 (4)	0.0 (0)	2.7(4)
			p<0.01

The small, regular nodular filtration were predominant in high exposure group of chest x ray (Table 6).

Table 6 Parenchymal abnormalities in chest x ray
Nodular opacity of form	High exposure % (n=56)	Low exposure % (n=88)	Total % (n=144)
No nodular infiltration	66.1 (37)	93.3 (81)	82.9 (118)
p	8.9 (5)	4.4 (4)	6.2 (9)
p, q	3.6 (2)	0.0 (0	1.4 (2)
p, q, r	3.6 (2)	1.1 (1)	2.1 (3)
p, q, t, u	1.8 (1)	0.0 (0)	0.7 (1)
q	5.4 (3)	0.0 (0)	2.1 (3)
q, r	5.4 (3)	0.0 (0)	2.1 (3)
s	1.8 (1)	1.1 (1)	1.4 (2)
s, t	1.8 (1)	0.0 (0)	0.7 (1)
s, t, u	1.8 (1)	0.0 (0)	0.7 (1)
			p<0.01

Some disease are different in 2 groups.  (Table 7).

Disease in working condition                                       Table 7
Өвчлөл	High exposure   % (n=56)	Low exposure % (n=87)	Total % (n=143)
Underweight	8.9 (5)	1.1 (1)	4.2 (6)
Normal weight	44.6 (25)	36.8 (32)	39.9 (57)
Over weight	33.9 (19)	35.6 (31)	35.0 (50)
Obesity	12.5 (7)	18.4 (16)	16.1 (23)
Over obesity	0 (0)	8.0 (7)	4.9 (7) *
Hypertention	32.1 (18)	37.9 (33)	35.7 (51)
Chronic bronchitis	10.7 (6)	8.1 (7)	9.2 (13)
Asthma	0 (0)	8.1 (7)	4.9 (7)*
COPD	3.6 (2)	1.2 (1)	2.1 (3)
Allergic rhinitis	8.9 (5)	8.1 (7)	8.5 (12)
Pneumoconiosis	32.1 (18)	8.0 (7)	17.5 (25)*
Old tuberculosis of lung	5.4 (3)	2.3 (2)	3.5 (5)
p<0.05

Work time is 8 hours per day in 59% of workers. Workers were participated of 27.8%(40) in mask education workshop. Now using mask is not good for them. (Figure 1).

Figure 1. Worker protect mask

Multiple logistic regression analysis described that some significant risk factors, including the working condition, working of over the 5 years had independent significantly with high risk for the pneumoconiosis (OR 3.5, 95% CI 1.21-10.0, p<0.01), and (OR 5.9, 95% CI 1.62-21.4, p<0.01), respectively (Table 8).

Multiple logistic regression analysis                            Table 8
Эрсдэлт хүчин зүйлс		OR	CI 95%	р value
1.	Drilling, blasting	3.5	1.21-10.0	p<0.01
2.	Smoking	2.0	0.41-9.94	p>0.05
3.	Gender (male)	1.1	0.08-14.3	p>0.05
4.	Working years 5>	5.9	1.62-21.4	p<0.01

Personal sampling of respirable dust (n=10) and total dust was carried out during two consecutive days in one mine. The percentile crystalline silica content and the combustible content of respirable dust were 24 and 2.9, respectively (MNS 6657:2017, MNS 5366:2004).

Work result and reports were introduced to Mrs Baljmaa.D Head of Public Health center of Bayankhongor province, doctor Bayanmunkh.Ts Head of department of Infection disease of Bayankhongor General Hospital and Tserendamba.J Director of Small-Scale Mining of community. Furthermore we have introducing to director of Health and Safety Solution LLC and planning of future works.

Conclusion :

1. Pneumoconiosis, lung tuberculosis and underweight more incidence in higher exposure group and obesity, hypertention and asthma more incidence in lower exposure group in n small-scale mining of Bayankhongor province.
2. Working condition, working of over the 5 years had independent significantly with high risk for the pneumoconiosis
3. The exposure to respirable crystaline silica was high during underground small scale mining. In the poor quality of personal equipment, the in the Tsagaan tsakhir area presumably at a high risk of developing pneumoconiosis.

We will introduced our work results to  Ministry of Labor and Social Welfare, Ministry of Mining and Heavy industry.